Area

Area is how much flat surface a shape covers, measured by counting equal squares that cover it with no gaps or overlaps: square centimetres (cm²) or square metres (m²). A rectangle's area is length × width, a parallelogram's is base × height, and a triangle's is half of base × height.

Depth 1 · Foundation

You know area is the surface inside a shape, measure it by counting unit squares, use cm² and m², and keep it apart from perimeter.

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Depths of understanding

1
Foundation
You know area is the surface inside a shape, measure it by counting unit squares, use cm² and m², and keep it apart from perimeter.
Read it
- Area: Counting SquaresGeometry Level 1: Shapes and Space
Opens after
QuadrilateralsArea starts with squares and rectangles, the four-sided shapes we cover and count.LengthThe units of area, cm² and m², are built from the units of length.
2
Deeper
You find a rectangle's area as length × width, and a square's as its side squared, and you know why: the squares make rows and columns.
Read it
- The Area of a RectangleGeometry Level 1: Shapes and Space
Master depth 1 first
MultiplicationThe squares covering a rectangle make rows and columns, so counting them is multiplying.
3
Connected
You find the area of a parallelogram (base × height) and a triangle (half of base × height) by cutting and rearranging, using the height measured straight up from the base.
Read it
- The Area of a ParallelogramGeometry Level 1: Shapes and Space
- The Area of a TriangleGeometry Level 1: Shapes and Space
Master depth 2 first
TrianglesThe area of a triangle is found by fitting two copies of it together.

Your path here

What's still between you and Area, depth 1, in the order you can learn it.

Where it fits

Builds on

Quadrilaterals LengthMeasurement

This concept

Opens up

Pythagoras' theorem

Builds onThis conceptOpens upQuadrilaterals LengthMeasurement AreaGeometry Pythagoras' theorem

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